The Tropical Rainforest of Sumatra, is situated in the middle of the island Sumatra, Indonesia, and consists of three national parks; Gunung Leuser National Park 8,629.75 square kilometers (3,331.97 sq mi), Kerinci Seblat National Park (KSNP) 13,753.50 square kilometers (5,310.26 sq mi) and Bukit Barisan Selatan National Park (BBSNP) 3,568 square kilometers (1,378 sq mi). The rainforest covers a total area of 25,000 square kilometers (9,700 sq mi), and represents a major portion of all the forests on the island of Sumatra. The national parks that make up the heritage site are all located on the spine of the Bukit Barisan Mountains, known as the Andes of Sumatra. Offering a magnificent panoramic view, the mountainous and untouched national parks contrast remarkably to the cultivated and developed lowlands of Sumatra. The mixed views from the Bukit Barisan mountain chain of the stunning Lake Gunung Tujuh (the highest lake in Southeast Asia), the splendor of the giant volcano Mount Kerinci, and many small volcanic, coastal and glacial lakes in natural forest settings create an environment of spectacular beauty. The three national parks host varied habitats and unique biodiversity. They comprise 50 percent of the total plant variety in Sumatra. At least ninety local common species have been recognized in Gunung Leuser National Park. Populations of both the world’s largest flower (Rafflesia arnoldi) and the world 's tallest flower (Amorphophallus titanum) are found there. During the twentieth century, this once vast island tropical rainforest was condensed into secluded areas in the space of 50 years. UNESCO designated The Tropical Rainforest Heritage of Sumatra a World Heritage Site for its biodiversity and its lowland and mountain forest.
The mountains have year-round little changing high temperatures, high humidity and high rainfall for nine months in
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